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Transverse pressure and strangeness dynamics in relativistic heavy-ion reactions

  • Transverse hadron spectra from proton-proton, proton-nucleus and nucleus-nucleus collisions from 2 AGeV to 21.3 ATeV are investigated within two independent transport approaches (HSD and UrQMD). For central Au+Au (Pb+Pb) collisions at energies above E lab ~ 5 AGeV, the measured K +- transverse mass spectra have a larger inverse slope parameter than expected from the default calculations. The additional pressure - as suggested by lattice QCD calculations at finite quark chemical potential mu q and temperature T - might be generated by strong interactions in the early pre-hadronic/partonic phase of central Au+Au (Pb+Pb) collisions. This is supported by a non-monotonic energy dependence of v2/pT in the present transport model.

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Metadaten
Author:Marcus BleicherORCiDGND, Elena L. BratkovskayaORCiDGND, Sascha VogelGND, Xianglei Zhu
URN:urn:nbn:de:hebis:30-19854
Document Type:Preprint
Language:English
Date of Publication (online):2005/10/27
Year of first Publication:2005
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/10/27
Source:http://arxiv.org/abs/hep-ph/0503252; J. Phys. / G; Bd. 31 (2005), S709-S716; Proceedings of Strange Quark Matter 2004
HeBIS-PPN:190440813
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht